Reactions and Changes
Nuclear Chemistry: An Introduction
Further Exploration
AJ Software - Extensive scientific and historical information including movies and photographs.
J. Chang, Brookhaven National Lab - Interactive table gives decay products, half-lives and reaction information on all known nuclear reactions.
Lawrence Berkeley National Laboratory - Interactive periodic table listing most of the known stable isotopes.
Biography

The Nobel Foundation
Classics
On a New, Strongly Radio-active Substance Contained in Pitchblende
P. Curie, Mme. P. Curie and G. Bémont - Translation of “Sur une nouvelle substance fortement radio-active, contenue dans la pechblende,” Comptes rendus de l'Académie des Sciences, Paris, 1898 (26 December), vol. 127, pp. 1215-1217.
News & Events
How Stuff Works
National Institutes of Health
The Why Files
News from around the world of science.
Research
Google - Research database allows searching of the scholarly literature.
Experiment!
Y. Miretskiy, SUNY Stony Brook - Java applet graphs decay of 4 radioactive elements into sequential decay products over time.
Next Generation Science Standards (NGSS)
Next Generation Science Standards: For States, By States
National Academies Press: A Framework for K-12 Science Education